|Publication number||US7469844 B2|
|Application number||US 11/131,718|
|Publication date||Dec 30, 2008|
|Filing date||May 18, 2005|
|Priority date||Nov 8, 2002|
|Also published as||CA2604347A1, CA2604347C, DE602006015307D1, EP1888256A1, EP1888256B1, US20050205916, WO2006110794A1|
|Publication number||11131718, 131718, US 7469844 B2, US 7469844B2, US-B2-7469844, US7469844 B2, US7469844B2|
|Inventors||Simon M. Conway, Thomas Jaworski, Heather R. Schramm, Scott D. Walter, Jeffrey L. Crull, Lawrence J. Fenske, Jonathan M. Mick|
|Original Assignee||S.C. Johnson & Son, Inc.|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (100), Non-Patent Citations (6), Referenced by (22), Classifications (28), Legal Events (5)|
|External Links: USPTO, USPTO Assignment, Espacenet|
This application is a continuation-in-part of Application No. PCT/US2003/036090, filed Nov. 10, 2003, which claims priority to U.S. Provisional Application Ser. No. 60/425,061, filed Nov. 8, 2002, and U.S. Provisional Application Ser. No. 60/670,519, filed Apr. 12, 2005. This application claims priority to all such previous applications, and such applications are hereby incorporated herein by reference in their entireties.
1. Technical Field
The present disclosure relates to diffusion devices, and more particularly, to diffusion devices for emitting more than one active material therefrom.
2. Description of the Background
A multitude of active material diffusion devices or diffusers exist in the marketplace. Many of such devices are passive devices that require only ambient air flow to disperse the liquid active material therein. Other devices are battery-powered or receive household power via a plug extending from the device. A cord may be coupled between the plug and the device, or the plug may be mounted directly on the device.
Various means for dispensing active materials from diffusion devices are also known in the art. For example, some diffusion devices include a heating element for heating an active material to promote vaporization thereof. Other diffusion devices employ a fan or blower to generate air flow to direct active material out of the diffusion device into the surrounding environment. In another type of diffusion device, active material may be emitted from the device using a bolus generator that delivers a pulse of air to eject a scent ring. Still other diffusion devices dispense active materials utilize ultrasonic means to dispense active materials therefrom.
In one example a diffusion device includes two heaters for dispersion of fragrances. The device includes a housing, a plug extending from the housing for insertion into an outlet, and two containers having fragrances therein and wicks extending therefrom to absorb fragrances from the containers. Each of the heaters is disposed adjacent one of the wicks to heat the respective wick to vaporize the fragrances therein. Optionally, a CPU controlled by internal software may first activate a first of the two heaters for a predetermined period of time. After the period of time expires, the CPU deactivates the first heater and thereafter activates the second heater.
Other diffusion devices include a housing having a cavity for receiving a cartridge. The cartridge generally has a plurality of scent elements disposed on a rotatable disk. A blower is mounted in the housing to generate airflow by passing air across a scent element and out an aperture in the housing. The housing further includes rotating means that rotate the rotatable disk, thereby rotating the scent elements thereon. The device diffuses a first scent for a predetermined time period and thereafter rotates the disk to a second scent and diffuses the second scent for the predetermined time period. This process repeats itself until the last scent element is diffused for the time period and then the disk is rotated to a home position.
Piezoelectrically actuated vibratory type liquid atomization apparatuses are described in Helf et al. U.S. Pat. No. 6,293,474, Martin et al. U.S. Pat. No. 6,341,732, Tomkins et al. U.S. Pat. No. 6,382,522, Martens, III et al. U.S. Pat. No. 6,450,419, Helf et al. U.S. Pat. No. 6,706,988, and Boticki et al. U.S. Pat. No. 6,843,430, all of which are assigned to the assignee of the present application and which are hereby incorporated by reference herein. These patents describe an apparatus comprising a piezoelectric actuating element coupled to a liquid atomization plate. The piezoelectric actuating element vibrates the liquid atomization plate in response to alternating electrical voltages applied to the actuating element. The vibration of the plate causes atomization of a liquid supplied to it by a liquid delivery system. An electrical circuit is provided to supply the alternating electrical voltages to conductive elements that are in electrical contact with opposite sides of the actuating element. The conductive elements may also serve to support the actuating element and the liquid atomization plate in a housing that contains the device.
According to one aspect of the present invention, a diffusion device comprises a bottom portion having a bottom cover disposed thereon. The device further includes a top portion having a top cover disposed atop the bottom portion and a pump assembly disposed between the top cover and the bottom cover. First, second, and third arm portions extend from the pump assembly, wherein the first, second, and third arm portions include first, second, and third piezoelectric devices, respectively, attached thereto.
According to yet another aspect of the present invention, a diffusion device comprises a top portion having a top cover and a bottom portion having a bottom cover, wherein the top cover is disposed atop the bottom cover, thereby forming a cavity therebetween. The device further includes a container disposed in the cavity, wherein the container includes an active material therein and a wick extending therefrom. Still further, the device includes a spring-loaded pump assembly slidingly connected to the bottom cover and including a piezoelectric element extending therefrom. When the top cover is inserted over the spring-loaded pump assembly, the pump assembly moves downwardly such that the piezoelectric element is moved into contact with the wick and when the cover is removed, the pump assembly moves upwardly and out of contact with the wick.
According to still a further aspect of the present invention, a method of diffusing first, second, and third active materials from a diffusion device comprises the step of selecting an intensity level for dispersion of the active material(s), wherein the intensity level is determined by the dwell time between active material emissions. The method further includes the step of selecting from one of the five different modes of operation including: emitting the first active material, emitting the second active material, emitting the third active material, alternating between emission of the first, second, and third active materials based on a first predetermined duration, and alternating between emission of the first, second, and third active materials based on a second predetermined duration.
Other aspects and advantages of the present invention will become apparent upon consideration of the following detailed description and the attached drawings, in which like elements are assigned like reference numerals.
The top cover 56 comprises first, second, and third columns 58 a-58 c that form first, second, and third compartments 60 a-60 c, respectively, between the top portion 52 and the bottom portion 54. As seen in
As seen in
As further seen in
Referring now to
Any of the piezoelectric devices described in any of the patents incorporated by reference herein may be utilized for the piezoelectric devices 106 a-106 c. In general, these devices apply an alternating voltage to a piezoelectric element to cause the element to expand and contract. The piezoelectric element is coupled to a perforated orifice plate, which in turn is in surface tension contact with a liquid source. The expansion and contraction of the piezoelectric element causes the orifice plate to vibrate up and down whereupon liquid is driven through the perforations in the orifice plate and is then emitted upwardly in the form of aerosolized particles.
When the top cover 56 is disposed atop the bottom portion 54, the pedestals 70 a-70 c, the containers 72 a-72 c, the arm portions 104 a-104 c, and the piezoelectric devices 106 a-106 c reside within the compartments 60 a-60 c, respectively. When in this closed position, top portions 108 a-108 c of the columns 58 a-58 c, respectively, force the arm portions 104 a-104 c downwardly, thereby forcing the piezoelectric devices 106 a-106 c into contact with the wicks 74 a-74 c, respectively. When the top cover 56 is removed, the pump assembly 78 as a whole moves upwardly in response to the biasing provided by the spring 79, thereby causing the arm portions 104 a-104 c to move upwardly and moving the piezoelectric devices 106 a-106 c out of contact with the respective wicks 74 a-74 c. Without contact of the piezoelectric devices 106 a-106 c with the wicks 74 a-74 c, respectively, the piezoelectric devices 106 a-106 c cannot properly atomize the active materials contained within the respective containers 72 a-72 c.
First, second, and third circular apertures 76 a-76 c are disposed in top portions of the first, second, and third columns 58 a-58 c, respectively, as seen in
As best seen in
Each of the selectors 110 a, 110 b includes five selectable positions. Selection of a position by the user with respect to one or both of the selectors 110 a, 110 b indicates to the respective slide switch 114 a, 114 b the current position of the respective selector 110 a, 110 b. The positions of the slide switches 114 a, 114 b are detected by the PCB 116. Components mounted on the PCB 116 control the piezoelectric devices 106 a-106 c corresponding to the positions of the selectors 110 a, 110 b. As seen in
In the present invention, every single emission or spray of active material has a period which includes an on time or period and a dwell time or period. The on time represents a time period for which an active material is actually emitted and the dwell time represents a duration between sprays in which the diffusion device 50 is inactive, i.e., not emitting an active material therefrom. Additionally, any of the active materials may be actuated for a predetermined duration, wherein the predetermined duration represents the entire length of time which an active material is to be emitted intermittently by the device. Preferably, a predetermined duration includes multiple periods as described above, but optionally may only includes a single period.
The operating mode selector 110 a controls the mode of operation of the diffusion device 50. For example, in one embodiment, the operating mode selector 110 a may include a slide switch with five different positions. When a user moves the selector 110 a to a first position, a mode of operation may be initiated wherein the first active material from the first container 72 a is emitted intermittently. Preferably, although not necessarily, emissions or sprays occur on a periodic basis, wherein the dwell time between sprays is constant for a selected intensity (as described in greater detail hereinafter). When the user slides the selector 110 a to a second position, a first auto mode of operation may be initiated wherein the diffusion device 50 alternates between emitting the active materials of the first, second, and/or third containers 72 a-72 c. In this mode, the sprays are preferably, although not necessarily, intermittent as described above with respect to the first mode. Illustratively, in one embodiment, the active material from one of the containers 72 a-72 c is sprayed intermittently for a first predetermined duration, thereafter the active material from a second of the containers 72 a-72 c is sprayed intermittently for a second predetermined duration, and thereafter the active material from a third of the containers 72 a-72 c is sprayed intermittently for a third predetermined duration. Any or all of the first, second, and third predetermined durations be the same, or the predetermined durations may all be different. The predetermined durations may be any preferred periods of time, but preferably are between about one minute and about twenty-four hours. Preferably, the predetermined period is between about 3 hours and about 24 hours. In one preferred embodiment, the predetermined period is about 3 hours and in another preferred embodiment, the predetermined period is about 24 hours. Other optional modes of operation for the first auto mode will be described hereinafter.
When the selector 10 a is moved to a third position, a mode of operation may be entered wherein the second active material from the second container 72 b is emitted intermittently, as described in detail above. In a fourth position, a second auto mode of operation may be initiated wherein the diffusion device 50 alternates between emitting the active materials from the first, second, and/or third active containers 72 a-72 c. The second auto mode may be similar to the auto mode described hereinabove with respect to the first auto mode, or may be any alternating mode of operation as described in detail hereinbelow. When the selector 110 a is moved to a fifth position, a mode of operation may be entered wherein the third active material from the third container 72 c is emitted intermittently, as described in detail above. Optionally, any of such described modes of operation may be placed in any position.
Although only two auto modes are described in the previous example, any number of auto modes can be utilized wherein no auto modes or used or up to five auto modes are used, wherein the auto modes are the same or different.
Various different auto modes may be incorporated into any of the embodiments herein. Such additional and/or substitute modes of operation may be utilized with changes to the circuitry, described hereinafter, and/or additional circuitry. Optionally, in one exemplary auto mode, the auto mode may function similar to the first auto mode discussed hereinabove, wherein such a sequence of active material emission may occur only once or may be repeated continuously. Still optionally, any two of the active materials may be emitted in an alternating fashion, as described above. Although the predetermined durations contemplate multiple periods for an active material, it is possible to utilize only one period, thus one spray, for one or more active materials.
Although the embodiments discussed thus far contemplate sequencing of the active materials, the first, second, and/or third active materials may be randomly actuated. In such a random mode, the on times, the dwell times, and/or the predetermined durations for each of the emitted active materials may all be the same or may all be different.
Illustratively, another mode varies the on time of one or more active material(s) that are emitted from the diffusion device 50. For example, the on time may be varied by gradually increasing or decreasing the time in which an active material is sprayed by the device. Optionally, another mode varies the dwell time for one or more active material(s) by gradually increasing or decreasing the time between sprays of active material.
In yet another mode of operation, the on time for an active material may be increased to thereby release more active material and may remain at that on time for a predetermined duration. The predetermined duration may be any time limit that prevents habituation of the active material, such as any time period between one minute and thirty minutes. After the predetermined duration, the on time for the active material may be decreased to thereby release less active material and may remain at that on time for the same or a different predetermined duration. This cycle may be repeated or may be repeated in a random or complex pattern. Also, any number of different active material emission levels may be utilized in such a mode of operation. Optionally, the dwell time for an active material may be decreased to thereby spray active material more frequently and may remain at that dwell time for a predetermined duration. Once the predetermined duration has expired, the dwell time may be increased to thereby spray active material less frequently and may remain at such dwell time for the same or different predetermined duration. Still optionally, the on time and dwell time for one or more active material may be decreased and/or increased as described above.
In another mode of operation, emission of all active materials may be discontinued for a predetermined off time, wherein the off time is a time period in which an active material is discontinued. The predetermined off time may be any period of time that allows the active material level to decrease or partially or fully dissipate from the surrounding environment, but preferably the predetermined off time is between about one minute and about thirty minutes. After the predetermined off time has expired, the emission of active material is resumed. This cycle may be repeated with the same, increasing, or decreasing off times.
Still alternatively, in another mode of operation, two or more active materials may be dispensed simultaneously in any manner as discussed herein.
Any of the modes of operation as disclosed herein or as known in the art may be utilized alone or in any combination. Also, any of these modes of operation may be utilized with a diffusion device that emits a single active material or a diffusion device that emits multiple active materials.
The emission frequency selector 110 b controls the frequency of active material emission of the diffusion device 50. For example, in one embodiment, the selector 10 b may include a slide switch with five different positions. Each spray of fragrance includes an on-time and a dwell time, wherein the on-time represents the time period in which a fragrance is sprayed and the dwell time represents a duration between sprays in which the diffusion device 50 is inactive, i.e., not emitting active material. Preferably, although not necessarily, the on-time remains constant. Optionally, the on-time may be of variable duration.
A first position of the selector 110 b may actuate a first dwell time, a second position may actuate a second dwell time, and a third position may actuate a third dwell time. Still further, fourth and fifth positions may actuate fourth and fifth dwell times, respectively. The dwell times may be of preferred durations, but preferably are between a few seconds and a few minutes. Most preferably, the first, second, third, fourth, and fifth dwell times are 30 seconds, 21 seconds, 15 seconds, 9 seconds, and 4.5 seconds, respectively. Another optional combination includes dwell times of 27 seconds, 18 seconds, 12 seconds, 9 seconds, and 4.5 seconds. Still another combination includes dwell times of 18 seconds, 12 seconds, 9 seconds, 6 seconds, and 4.5 seconds.
Optionally, the selectors 110 a and 110 b may include any number of positions corresponding to a preferred number of modes or intensities. Also, the positions may correspond to any mode or intensity.
As further seen in FIGS. 8 and 9A-C, the bottom portion 54 of the diffusion device 50 includes two batteries 122 a, 122 b that preferably provide direct current that is converted into high-frequency alternating current power that is selectively applied to the piezoelectric devices 106 a-106 c. Optionally, the diffusion device 50 may be powered by alternating household current, which is rectified and converted to high-frequency alternating current power that is intermittently applied to the piezoelectric devices 106 a-106 c. The batteries 122 a, 122 b may be any conventional dry cell battery such as “A”, “AA”, “AAA”, “C”, and “D” cells, button cells, watch batteries, and solar cells, but preferably, the batteries 98 a, 98 b are “AA” or “AAA” cell batteries. Although two batteries are preferred, any number of batteries that would suitably fit within the device and provide adequate power level and service life may be utilized.
As seen in
The bottom portion 54 may further include optional feet 138 a-138 c extending therefrom to aid in stabilizing the diffusion device 50. Although three feet 138 are depicted, any suitable number of feet 138 for stabilizing the diffusion device 50 may be utilized.
As further seen in
A second embodiment of a diffusion device 150 of the present invention is depicted in
The top cover 156 comprises first, second, and third cylindrical columns 158 a-158 c that form first, second, and third compartments 160 a-160 c, respectively between the top portion 152 and the bottom portion 154. Preferably, as seen in
As seen in
Three containers 172 a-172 c each include a wick 174 a-174 c extending therefrom and a cap portion 207 a-207 c having two opposing connecting lugs 209 a-209 f extending therefrom. Further, each of the arm portions 204 a-204 c includes two opposing bayonet slots that accept the respective connecting lugs 209 a-209 f therein to allow the containers to be screwed into and retained in the corresponding arm portions 204 a-204 c. Such a connection is described in detail in Schramm et al. U.S. Pat. No. 6,446,880, which is assigned to the assignee of the present application and which is hereby incorporated by reference. Optionally, any other means for releasably connecting the containers 172 a-172 c with the arm portions 204 a-204 c may be utilized.
First, second, and third circular apertures 177 a-177 c are disposed in top portions 211 a-211 c of the first, second, and third columns 158 a-158 c, respectively, as seen in
As best seen in
The bottom portion 154 contains the same components as shown and described in connection with the embodiment of
Although not seen in the embodiment of
As seen in
Similar to the embodiment of
Containers 272 a-272 c having wicks 274 a-274 c extending therefrom are inserted and removed from the arm portions 304 a-304 c in the same manner as described in connection with the embodiment of
An operating mode selector 310 a and an emission frequency selector 310 b both in the form of pivoting arms extend from the bottom portion 254 of the diffuser 250. The operating mode selector 310 a controls the mode of diffusion of device 250 and extends through an aperture 312 a in the bottom portion 254 of the diffuser 250. The operating mode selector 310 a works similarly to the operating mode selector 110 a of the embodiment of
The bottom portion 254 contains the same components as shown and described in connection with the embodiment of
A fourth embodiment of a diffusion device 350 of the present invention is depicted in
Referring now to
As seen in
An operating mode selector 410 a extends through an apertures 412 a disposed in the lid 355 and controls the operating mode of the device 350. The operating mode selector 410 a is similar to and operates in a fashion similar to the embodiment of
An emission frequency selector 410 b controls an emission frequency of the diffusion device 350 and extends through and moves along another aperture 412 b in the lid 355. The emission frequency selector 410 b is similar to and operates in a manner similar to the emission frequency selector 10 b discussed with respect to the embodiment of
As seen in
In the embodiment of
In any of the embodiments herein, an LED may be incorporated into the device to provide an indication to the user. For example, any of the embodiments may include an LED protruding from the bottom portion of the device, wherein the LED indicates an on/off condition of the device or a battery power of the device. In another example, the embodiment of
Referring next to
The IC 602 includes an internal oscillator that is controlled by a crystal 608 coupled between pins 5 and 6 of the IC 602. A resistor R6 is coupled between one end of the crystal 608 and ground potential. In addition, the IC 602 receives the voltage Vcc and ground potential at pins 2 and 4 thereof, respectively. A pin 7 of the integrated circuit 602 is coupled to a junction between a resistor R7 and a capacitor C5. A further end of the resistor R7 is coupled to Vcc and a capacitor C6 is coupled between Vcc and ground. A pin 24 of the integrated circuit 602 is coupled to an LED 609 and a resistor R8, wherein an end of the resistor R8 is also coupled to Vcc. The IC 602 receives a signal SW_READ at a pin 10 via a resistor R9 that is connected to ground. The signal SW_READ indicates the position of the selector 110 a. More specifically, the signal SW_READ indicates which of pins 3 and 11-14 (ENABLE4, ENABLE5, ENABLE6, ENABLE7, and ENABLE8, respectively) is coupled to pin 10 of the IC 602. The signal SW_READ may be read in conjunction with signals ENABLE4, ENABLE5, ENABLE6, ENABLE7, and ENABLE8.
The IC 602 also receives a signal ADC_TIME_SET at pin 20, wherein the signal ADC_TIME_SET indicates the corresponding time interval for the position of the selector 110 b that has been selected. Signal ADC_TIME_SET may be read in conjunction with signal ENABLE 10, wherein ADC_TIME_SET is an analog input pin that reads different voltages created by the resistor network including resistors R10-R13 depending on the position of the selector 10 b.
A Schottky diode D1 is coupled between the 3.3V reference and Vcc. A further capacitor C8 is coupled between Vcc and ground potential. Capacitor C9 is connected to a first terminal 610 of a primary winding 612 of a transformer 614. A first terminal 616 of a secondary winding 618 of the transformer 614 is coupled through an inductor L2 to a junction 620. Second terminals 622 and 624 of the primary and secondary windings 612, 618, respectively are coupled to a further junction 626. The junction 626 is coupled by a field effect transistor (FET) Q1 to ground. A biasing resistor R15 is coupled between a gate and a source of the FET Q1 and the gate receives a control signal PWM through a resistor R16. The signal PWM is developed at a pin 23 of the IC 602.
The junction 620 is coupled to first terminals of piezoelectric elements 630, 632, 634. The piezoelectric element 630 comprises the driving element for the piezoelectric device 86 a, the piezoelectric element 632 comprises the driving element for the piezoelectric device 86 b, and the piezoelectric element 634 comprises the driving element for the piezoelectric device 86 c. Second terminals of the piezoelectric elements 630, 632, 634 are coupled by FET's Q2, Q3, and Q4, respectively, to ground. A biasing resistor R17 is coupled between the gate and the source of the FET Q2 and the gate of the FET Q2 receives a control signal ENABLE1 through a resistor R18. Similarly, a biasing resistor R19 is coupled between the gate and the source of the FET Q3 and a control signal ENABLE2 is coupled through a resistor R20 to the gate of the FET Q3. Still similarly, another biasing resistor R21 is coupled between the gate and the source of the FET Q4 and a control signal ENABLE3 is coupled through resistor R22 to the gate of the FET Q4. The control signals ENABLE1, ENABLE2, and ENABLE3 are developed at pins 9, 8 and 21, of the IC 602.
Referring next to the flow chart of
Once the mode has been selected, a block 718 checks the position of the selector 110 b in a fashion similar to the blocks 700-716 described above to determine the selected emission frequency. Once the emission frequency has been determined, a block 718 causes the IC 602 to develop the signals PWM, ENABLE1, ENABLE2, and ENABLE3, in turn to cause the piezoelectric elements 630, 632, 634 to be energized in accordance with the selected mode of operation and emission frequency. Specifically, a high frequency pulse-width modulated waveform having a frequency between about 130 kHz and about 165 kHz is provided as the control signal PWM, thereby causing the FET Q1 to rapidly turn on and off, thereby causing high frequency alternating current power to be provided to the junction 620. When the piezoelectric element 630 is to be operated, a high state signal is provided as the signal ENABLE1, thereby turning on the FET Q2. When the piezoelectric element 632 is to be operated, a high state signal is provided as the signal ENABLE2, thereby turning on the FET Q3. When the piezoelectric element 634 is to be operated, a high state signal is provided as the signal ENABLE3, thereby turning on the FET Q4.
In summary, a user may operate any of the devices as described herein to emit a selected one of three different active materials for a particular period of time at a selected emission frequency, or may cause the unit to alternate between emissions of different active materials at a selected emission frequency.
Although the embodiments as discussed herein are shown and described as being powered by a direct current source, such as batteries, other alternating current power sources are contemplated. For example, any of the devices as described herein may operate on household power via a plug extending from the device, wherein a cord may be coupled to the plug and the device. Still optionally, the plug may be mounted directly to the device for insertion into a household power source.
Illustratively, the types of liquid active materials described herein may be, for example, an insecticide, an insect repellant, an insect attractant, a disinfectant, a mold or mildew inhibitor, a fragrance, a disinfectant, an air purifier, an aromatherapy scent, an antiseptic, an odor eliminator, a positive fragrancing active material, an air-freshener, a deodorizer, or the like, and combinations thereof. The present application contemplates the use of the same or different active materials and/or the same or different types of active materials. For example, container 72 a may include a fragrance therein, container 72 b may include an insecticide, and container 72 c may include a disinfectant. Alternatively, in another example, the container 72 a may include a strawberry fragrance, the container 72 b may include a vanilla fragrance, and the container 72 c may include an orange fragrance. As such, any combination of types of liquid active materials may be utilized in any of the containers of any of the embodiments disclosed herein.
Optionally, the piezoelectric-type devices as disclosed herein may be replaced by any other known diffuser devices. For example, the piezoelectric devices may be replaced by heated-wick type devices, passive devices, aerosol devices, and the like, and combinations thereof.
Illustratively, the diffusion devices are made of a thermoplastic material, preferably polypropylene, and are injection molded, although the device may be made of any other suitable material. Various components of the embodiments of diffusion devices are fastened together. As such, any fastening means may be used, including, but not limited to heat-staking or any other suitable fastening means, including, for example, rivets, press fit, snap fit, screws, ultrasonic welding, adhesives, or the like and combinations thereof.
The containers of the present invention are replaceable when empty or whenever a user desires a new active material. One or more containers may be removed and replaced at the same time. Optimally, the active material in all three containers would be used up in a similar timeframe, thereby necessitating the removal and replacement of all three containers at one time. As such, containers having active materials therein may be sold in three-packs that may have a theme. Optionally, containers may be sold individually for purchase by a consumer.
Although the embodiments disclosed herein depict diffusion devices with three piezoelectric devices and three containers, the features of any of the embodiments as disclosed herein may be incorporated into a diffusion device having any number of piezoelectric devices and containers. In one example, a diffusion device may have only one piezoelectric device and one container. In another example, a diffusion device may have two piezoelectric devices and two containers.
The diffusion devices of the present invention can be used to automatically dispense multiple active materials over an extended period of time, with the added advantage that the frequency of dispersion and the mode of operation may be adjusted. Various methods of inserting containers may be utilized to enable a purchaser of such a diffusion device to easily remove and replace the containers.
Numerous modifications will be apparent to those skilled in the art in view of the foregoing description. Accordingly, this description is to be construed as illustrative only and is presented for the purpose of enabling those skilled in the art to make and use the invention and to teach the best mode of carrying out same. All patents and other references cited herein are incorporated by reference in their entirety. The exclusive rights to all modifications which come within the scope of the appended claims are reserved.
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|U.S. Classification||239/102.2, 239/326, 261/DIG.65, 239/305, 422/123, 261/DIG.88, 239/145, 239/66|
|International Classification||A63H33/40, A61L9/12, B05B12/04, A61L9/03, A61L9/14, H01L27/108, B05B17/06, B05B1/08|
|Cooperative Classification||Y10S261/88, A61L9/125, A61L9/14, A61L9/127, B05B17/0607, Y10S261/65, B05B12/04, B05B17/0638|
|European Classification||A61L9/14, B05B17/06B, B05B12/04, A61L9/12W|
|Aug 25, 2008||AS||Assignment|
Owner name: S.C. JOHNSON & SON, INC., WISCONSIN
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BIT 7, INC.;REEL/FRAME:021434/0474
Effective date: 20050610
Owner name: BIT 7, INC., WISCONSIN
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CRULL, JEFFREY L.;FENSKE, LAWRENCE J.;MICK, JONATHAN M.;REEL/FRAME:021434/0451
Effective date: 20050610
Owner name: S.C. JOHNSON & SON, INC., WISCONSIN
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CONWAY, SIMON M.;JAWORSKI, THOMAS;SCHRAMM, HEATHER R.;AND OTHERS;REEL/FRAME:021434/0428;SIGNING DATES FROM 20050531 TO 20050606
|Jul 2, 2012||FPAY||Fee payment|
Year of fee payment: 4
|Aug 12, 2016||REMI||Maintenance fee reminder mailed|
|Dec 30, 2016||LAPS||Lapse for failure to pay maintenance fees|
|Feb 21, 2017||FP||Expired due to failure to pay maintenance fee|
Effective date: 20161230